org.quartz.impl.jdbcjobstore
Class StdRowLockSemaphore

java.lang.Object
  org.quartz.impl.jdbcjobstore.DBSemaphore
      org.quartz.impl.jdbcjobstore.StdRowLockSemaphore

All Implemented Interfaces:

Constants, Semaphore, StdJDBCConstants, TablePrefixAware

public class StdRowLockSemaphore
extends DBSemaphore

Internal database based lock handler for providing thread/resource locking in order to protect resources from being altered by multiple threads at the same time.

Author:

jhouse

Field Summary

static String	INSERT_LOCK
static String	SELECT_FOR_LOCK

Fields inherited from interface org.quartz.impl.jdbcjobstore.StdJDBCConstants

COUNT_MISFIRED_TRIGGERS_IN_STATE, DELETE_ALL_BLOB_TRIGGERS, DELETE_ALL_CALENDARS, DELETE_ALL_CRON_TRIGGERS, DELETE_ALL_JOB_DETAILS, DELETE_ALL_PAUSED_TRIGGER_GRPS, DELETE_ALL_SIMPLE_TRIGGERS, DELETE_ALL_SIMPROP_TRIGGERS, DELETE_ALL_TRIGGERS, DELETE_BLOB_TRIGGER, DELETE_CALENDAR, DELETE_CRON_TRIGGER, DELETE_FIRED_TRIGGER, DELETE_FIRED_TRIGGERS, DELETE_INSTANCES_FIRED_TRIGGERS, DELETE_JOB_DETAIL, DELETE_NO_RECOVERY_FIRED_TRIGGERS, DELETE_PAUSED_TRIGGER_GROUP, DELETE_PAUSED_TRIGGER_GROUPS, DELETE_SCHEDULER_STATE, DELETE_SIMPLE_TRIGGER, DELETE_TRIGGER, INSERT_BLOB_TRIGGER, INSERT_CALENDAR, INSERT_CRON_TRIGGER, INSERT_FIRED_TRIGGER, INSERT_JOB_DETAIL, INSERT_PAUSED_TRIGGER_GROUP, INSERT_SCHEDULER_STATE, INSERT_SIMPLE_TRIGGER, INSERT_TRIGGER, SCHED_NAME_SUBST, SELECT_BLOB_TRIGGER, SELECT_CALENDAR, SELECT_CALENDAR_EXISTENCE, SELECT_CALENDARS, SELECT_CRON_TRIGGER, SELECT_FIRED_TRIGGER, SELECT_FIRED_TRIGGER_GROUP, SELECT_FIRED_TRIGGER_INSTANCE_NAMES, SELECT_FIRED_TRIGGERS, SELECT_FIRED_TRIGGERS_OF_JOB, SELECT_FIRED_TRIGGERS_OF_JOB_GROUP, SELECT_HAS_MISFIRED_TRIGGERS_IN_STATE, SELECT_INSTANCES_FIRED_TRIGGERS, SELECT_INSTANCES_RECOVERABLE_FIRED_TRIGGERS, SELECT_JOB_DETAIL, SELECT_JOB_EXECUTION_COUNT, SELECT_JOB_EXISTENCE, SELECT_JOB_FOR_TRIGGER, SELECT_JOB_GROUPS, SELECT_JOB_NONCONCURRENT, SELECT_JOBS_IN_GROUP, SELECT_JOBS_IN_GROUP_LIKE, SELECT_MISFIRED_TRIGGERS, SELECT_MISFIRED_TRIGGERS_IN_GROUP_IN_STATE, SELECT_MISFIRED_TRIGGERS_IN_STATE, SELECT_NEXT_FIRE_TIME, SELECT_NEXT_TRIGGER_TO_ACQUIRE, SELECT_NUM_CALENDARS, SELECT_NUM_JOBS, SELECT_NUM_TRIGGERS, SELECT_NUM_TRIGGERS_FOR_JOB, SELECT_NUM_TRIGGERS_IN_GROUP, SELECT_PAUSED_TRIGGER_GROUP, SELECT_PAUSED_TRIGGER_GROUPS, SELECT_REFERENCED_CALENDAR, SELECT_SCHEDULER_STATE, SELECT_SCHEDULER_STATES, SELECT_SIMPLE_TRIGGER, SELECT_TRIGGER, SELECT_TRIGGER_DATA, SELECT_TRIGGER_EXISTENCE, SELECT_TRIGGER_FOR_FIRE_TIME, SELECT_TRIGGER_GROUPS, SELECT_TRIGGER_GROUPS_FILTERED, SELECT_TRIGGER_STATE, SELECT_TRIGGER_STATUS, SELECT_TRIGGERS_FOR_CALENDAR, SELECT_TRIGGERS_FOR_JOB, SELECT_TRIGGERS_IN_GROUP, SELECT_TRIGGERS_IN_GROUP_LIKE, SELECT_TRIGGERS_IN_STATE, TABLE_PREFIX_SUBST, UPDATE_BLOB_TRIGGER, UPDATE_CALENDAR, UPDATE_CRON_TRIGGER, UPDATE_FIRED_TRIGGER, UPDATE_JOB_DATA, UPDATE_JOB_DETAIL, UPDATE_JOB_TRIGGER_STATES, UPDATE_JOB_TRIGGER_STATES_FROM_OTHER_STATE, UPDATE_SCHEDULER_STATE, UPDATE_SIMPLE_TRIGGER, UPDATE_TRIGGER, UPDATE_TRIGGER_GROUP_STATE_FROM_STATE, UPDATE_TRIGGER_GROUP_STATE_FROM_STATES, UPDATE_TRIGGER_SKIP_DATA, UPDATE_TRIGGER_STATE, UPDATE_TRIGGER_STATE_FROM_STATE, UPDATE_TRIGGER_STATE_FROM_STATES, UPDATE_TRIGGER_STATES_FROM_OTHER_STATES

Fields inherited from interface org.quartz.impl.jdbcjobstore.Constants

ALIAS_COL_NEXT_FIRE_TIME, ALL_GROUPS_PAUSED, COL_BLOB, COL_CALENDAR, COL_CALENDAR_NAME, COL_CHECKIN_INTERVAL, COL_CRON_EXPRESSION, COL_DESCRIPTION, COL_END_TIME, COL_ENTRY_ID, COL_ENTRY_STATE, COL_FIRED_TIME, COL_INSTANCE_NAME, COL_IS_DURABLE, COL_IS_NONCONCURRENT, COL_IS_UPDATE_DATA, COL_IS_VOLATILE, COL_JOB_CLASS, COL_JOB_DATAMAP, COL_JOB_GROUP, COL_JOB_NAME, COL_LAST_CHECKIN_TIME, COL_LOCK_NAME, COL_MISFIRE_INSTRUCTION, COL_NEXT_FIRE_TIME, COL_PREV_FIRE_TIME, COL_PRIORITY, COL_REPEAT_COUNT, COL_REPEAT_INTERVAL, COL_REQUESTS_RECOVERY, COL_SCHED_TIME, COL_SCHEDULER_NAME, COL_START_TIME, COL_TIME_ZONE_ID, COL_TIMES_TRIGGERED, COL_TRIGGER_GROUP, COL_TRIGGER_NAME, COL_TRIGGER_STATE, COL_TRIGGER_TYPE, DEFAULT_TABLE_PREFIX, STATE_ACQUIRED, STATE_BLOCKED, STATE_COMPLETE, STATE_DELETED, STATE_ERROR, STATE_EXECUTING, STATE_MISFIRED, STATE_PAUSED, STATE_PAUSED_BLOCKED, STATE_WAITING, TABLE_BLOB_TRIGGERS, TABLE_CALENDARS, TABLE_CRON_TRIGGERS, TABLE_FIRED_TRIGGERS, TABLE_JOB_DETAILS, TABLE_LOCKS, TABLE_PAUSED_TRIGGERS, TABLE_SCHEDULER_STATE, TABLE_SIMPLE_TRIGGERS, TABLE_TRIGGERS, TTYPE_BLOB, TTYPE_CAL_INT, TTYPE_CRON, TTYPE_DAILY_TIME_INT, TTYPE_SIMPLE

Constructor Summary

StdRowLockSemaphore()

StdRowLockSemaphore(String tablePrefix, String schedName, String selectWithLockSQL)

Method Summary

protected void	executeSQL(Connection conn, String lockName, String expandedSQL, String expandedInsertSQL) Execute the SQL select for update that will lock the proper database row.
protected String	getSelectWithLockSQL()
void	setSelectWithLockSQL(String selectWithLockSQL)

Methods inherited from class org.quartz.impl.jdbcjobstore.DBSemaphore

getLog, getSchedName, getSchedulerNameLiteral, getSQL, getTablePrefix, isLockOwner, obtainLock, releaseLock, requiresConnection, setInsertSQL, setSchedName, setSQL, setTablePrefix

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SELECT_FOR_LOCK

public static final String SELECT_FOR_LOCK

See Also:

Constant Field Values

INSERT_LOCK

public static final String INSERT_LOCK

See Also:

Constant Field Values

Constructor Detail

StdRowLockSemaphore

public StdRowLockSemaphore()

StdRowLockSemaphore

public StdRowLockSemaphore(String tablePrefix,
                           String schedName,
                           String selectWithLockSQL)

Method Detail

executeSQL

protected void executeSQL(Connection conn,
                          String lockName,
                          String expandedSQL,
                          String expandedInsertSQL)
                   throws LockException

Execute the SQL select for update that will lock the proper database row.

Specified by:

executeSQL in class DBSemaphore

Throws:

LockException

getSelectWithLockSQL

protected String getSelectWithLockSQL()

setSelectWithLockSQL

public void setSelectWithLockSQL(String selectWithLockSQL)